物体的浮和沉与它的轻重、大小有关。

根据下列装置回答有关问题（装置C可多次使用）：

阅读短文及文后选项，选出可以填入空白处的最佳选项。
    Taking good notes is a time-saving skill that will help you to become a better student in several ways____  Second, your notes are excellent materials to refer to when you are studying for a test. Third, note-taking offers variety to your study time and helps you to hold your interest.     You will want to take notes during classroom discussions and while reading a textbook or doing research for a report ____ Whenever or however you take notes, keep in mind that note-taking is a process of choosing notes____

    The following methods may work best for you.

    ●Read the text quickly to find the main facts and ideas in it.

    ●Read the text carefully and watch for words that can show main points and supporting facts.

    ●Write your notes in your own words.

    ●____  

    ●Note any questions or ideas you may have about what was said or written.

    As you take notes, you may want to use your own shorthand(速记). Wheyou do it, be sure that you understand your symbols and you will use them all the time.____.

A. Use words, not complete sentences.

B. Otherwise, you may not be able to read your notes later.

C. you will also want to develop your own method for taking notes.

D. That means you must first decide what is important enough to include in your notes.

E. First, the simple act of writing something down makes it easier for you to understand and remember it.

阅读材料，回答问题

材料一：暑假中，晶晶一家到外地旅游，一路上拍摄了不少照片。回家后，晶晶整理照片，在每张照片的旁边写上旅游时的感受，并注明时间、地点，她把这册照片称为《暑期生活情趣》，与爸爸妈妈重温暑期生活。

材料二：小文放学后，听一会儿音乐，做完作业后，给爷爷和奶奶念 报纸，讲时事。

材料三：小李近来迷恋上计算机，他只用计算机玩游戏，常常一放学就准备好钱，跑到网吧玩游戏，一玩就是三四个小时。没有钱时，就对爸爸就谎，说是要买书，拿到钱后又去玩游戏，耽误学习，成绩明显下降。

下列试剂中，标签上应标注 和 的是（　　）